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Homework Help: Series circuit problem

  1. Sep 12, 2014 #1
    1.A circuit consists of 3 resistors connected in series to a 24.0 V battery. The current in the circuit is 32.0 mA. If 2 of the resistors are 250.0  and 150.0 ,

    find the value of the third resistor.

    find the potential difference across each resistor.

    2. R=V/I

    3. I calculated the third resistor to be 350 ohms

    I am confused on what this means "find the potential difference across each resistor."

    What equation do I use for this?
    Last edited by a moderator: Sep 12, 2014
  2. jcsd
  3. Sep 12, 2014 #2
    You know the current through each resistor and you know the resistance for each.
    You need the voltage. What equation would you use?
  4. Sep 12, 2014 #3
    Use the term "voltage drop" instead of potential difference, and you'll have the answer. :)
  5. Sep 12, 2014 #4
    Isn't the voltage given though at 24 v?
  6. Sep 12, 2014 #5


    User Avatar

    Staff: Mentor

    Yes, so when you sum the three resistor voltages the result must equal 24V. Determine the separate resistor voltages. Apply Ohm's Law.
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